Skip to content

Finance Hub

  • Market AnalysisExpand
    • Asset Class Analysis (e.g., Bonds, Equities, ETFs)
    • Interest Rates & Monetary Policy
    • Analytical Tools & Methods
    • Semiconductors
    • Financial Sector
    • Technology
  • Company & Sector Deep DivesExpand
    • Health Care (GICS 35): KPIs, Valuation Notes, and Deep Dives
    • Information Technology — Sector Hub (GICS 45)
  • Python for FinanceExpand
    • Portfolio Management
    • Fundamental Analysis
    • Screeners
    • Technical Analysis & Indicators
  • Privacy Policy
Finance Hub
  • Scorecard of seven AI runs on twelve ASML fiscal 2025 figures, checked against the XBRL in ASML's 20-F: Claude's two memory runs show wrong R&D, capex and cash figures and a diluted EPS answer equal to the basic figure, GPT and Gemini declined all but 2024 net sales, and Claude with web search matched every filed figure
    AI for Finance Research

    AI for financial data analysis: check the numbers against SEC XBRL

    ByJose Manuel November 12, 2026

    Claude, OpenAI’s GPT model and Gemini were asked for twelve ASML fiscal 2025 figures without web search. A short Python check against the 20-F’s XBRL found Claude’s wrong capex, cash and R&D figures and a diluted EPS answer that equals the basic figure; with web search, Claude matched every filed figure.

    Read More AI for financial data analysis: check the numbers against SEC XBRLContinue

  • Python for Finance

    How to fix yfinance rate limit errors in 2026 (YFRateLimitError)

    ByJose Manuel November 7, 2026November 7, 2026

    A yfinance rate limit error can come from the session you pass in. Python code that counts the requests behind each yfinance call, backs off, catches empty downloads and caches results, worked on ASML.

    Read More How to fix yfinance rate limit errors in 2026 (YFRateLimitError)Continue

  • The three models' answers to the stock-based compensation question on Alphabet's fiscal 2025 10-K, from the saved runs, with GPT run 1's use of the Note 13 total marked in red
    AI for Finance Research

    Claude vs ChatGPT vs Gemini for stock analysis: one 10-K, three models

    ByJose Manuel November 3, 2026November 12, 2026

    Claude, OpenAI’s GPT model and Gemini read the same Alphabet 10-K with the same prompts, twice each. Every figure matched the filing and every run refused the trap questions; one run picked a different stock-based compensation figure.

    Read More Claude vs ChatGPT vs Gemini for stock analysis: one 10-K, three modelsContinue

  • Bar chart of ASML's revenue, net income and free cash flow for fiscal 2018 to 2025 in euro billions, built from the SEC's XBRL company facts
    Fundamental Analysis | Python for Finance

    How to build an XBRL parser in Python: SEC filings to JSON

    ByJose Manuel October 31, 2026November 12, 2026

    Python code that flattens the SEC’s XBRL company facts into JSON and parses a filing’s XBRL instance for the regional and product figures the API leaves out, worked on ASML.

    Read More How to build an XBRL parser in Python: SEC filings to JSONContinue

  • Claude Code's printed DCF output for Alphabet: the valuation block from enterprise value through the bridge to value per share as of 30 June 2026, with the balance-sheet date and the excluded non-marketable securities marked in red
    AI for Finance Research

    How I build a DCF with Claude Code, and where it got numbers wrong

    ByJose Manuel October 29, 2026October 29, 2026

    Claude Code built a DCF of Alphabet from SEC XBRL data in three minutes. Every input matched the filings; the balance sheet was a quarter old and $131.5 billion of securities were left out.

    Read More How I build a DCF with Claude Code, and where it got numbers wrongContinue

  • Bar chart of Alphabet's revenue, operating income and free cash flow for fiscal 2022 to 2025, in billions of dollars, built from SEC XBRL data
    Fundamental Analysis | Python for Finance

    How to use the SEC EDGAR API in Python (no API key)

    ByJose Manuel October 24, 2026November 1, 2026

    Free Python code that pulls a company’s XBRL financial data from the SEC EDGAR API, worked on Alphabet and checked against its 10-K.

    Read More How to use the SEC EDGAR API in Python (no API key)Continue

  • Lumentum quarterly revenue and GAAP margins, fiscal 2025 and 2026
    Semiconductors

    How does Lumentum make money?

    ByJose Manuel October 22, 2026October 22, 2026

    Lumentum sells lasers as hardware, mostly into AI data center networks. Where its revenue comes from, why its margins swing, who its customers are and what to watch.

    Read More How does Lumentum make money?Continue

  • NVIDIA and memory costs
    Semiconductors | Technology

    NVIDIA’s customers just got the memory bill

    ByJose Manuel August 23, 2026October 22, 2026

    Bloomberg says builders of NVIDIA systems are preparing price increases of more than 15% in many cases as memory costs rise. That is the Micron thesis in one sentence. Disclosure: I currently hold a long position in MU and in NVDA. This piece first went out on Sector Playbook. If you want the next one…

    Read More NVIDIA’s customers just got the memory billContinue

  • Waymo: Potential Revenue Projections for 2025 and 2026
    Company & Sector Deep Dives | Technology

    Is Waymo profitable in 2026?

    ByJose Manuel August 22, 2026October 22, 2026

    Updated August 2026. This page started as a March 2025 revenue forecast. The question people are actually typing is whether Waymo is profitable. That is the question this version answers. Waymo is not a profitable standalone company in 2026. Alphabet does not publish a Waymo income statement. The closest public line is Other Bets, the…

    Read More Is Waymo profitable in 2026?Continue

  • CAPEX and Hyperscalers
    Market Outlook & Commentary | Technology

    Everyone Is Asking the Wrong Question About Hyperscalers and the Iran War

    ByJose Manuel March 9, 2026October 22, 2026

    The energy cost story is a red herring. The real risk is sitting in a data center in Bahrain. There is a question bouncing around finance Twitter right now that goes roughly like this: “Oil is at $110. Natural gas is spiking. Doesn’t this crush hyperscaler margins?” It’s a reasonable question. It’s also the wrong…

    Read More Everyone Is Asking the Wrong Question About Hyperscalers and the Iran WarContinue

Page navigation

1 2 3 … 11 Next PageNext
  • About
  • Legal Notice (Imprint)
  • Terms and Conditions
  • Privacy Policy

Footer

  • About
  • Legal Notice (Imprint)
  • Terms and Conditions
  • Privacy Policy

We improve our products and advertising by using Microsoft Clarity to see how you use our website. By using our site, you agree that we and Microsoft can collect and use this data. Our privacy statement (link) has more details.

  • Market Analysis
    • Asset Class Analysis (e.g., Bonds, Equities, ETFs)
    • Interest Rates & Monetary Policy
    • Analytical Tools & Methods
    • Semiconductors
    • Financial Sector
    • Technology
  • Company & Sector Deep Dives
    • Health Care (GICS 35): KPIs, Valuation Notes, and Deep Dives
    • Information Technology — Sector Hub (GICS 45)
  • Python for Finance
    • Portfolio Management
    • Fundamental Analysis
    • Screeners
    • Technical Analysis & Indicators
  • Privacy Policy
Search